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V4L/DVB (10452): Add Freescale MC44S803 tuner driver
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Add Freescale MC44S803 tuner driver.

Signed-off-by: Jochen Friedrich <jochen@scram.de>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Jochen Friedrich authored and Mauro Carvalho Chehab committed Mar 30, 2009
1 parent 812b1f9 commit b72dbae
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8 changes: 8 additions & 0 deletions drivers/media/common/tuners/Kconfig
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Expand Up @@ -29,6 +29,7 @@ config MEDIA_TUNER
select MEDIA_TUNER_TEA5767 if !MEDIA_TUNER_CUSTOMIZE
select MEDIA_TUNER_SIMPLE if !MEDIA_TUNER_CUSTOMIZE
select MEDIA_TUNER_TDA9887 if !MEDIA_TUNER_CUSTOMIZE
select MEDIA_TUNER_MC44S803 if !MEDIA_TUNER_CUSTOMIZE

menuconfig MEDIA_TUNER_CUSTOMIZE
bool "Customize analog and hybrid tuner modules to build"
Expand Down Expand Up @@ -164,4 +165,11 @@ config MEDIA_TUNER_MXL5007T
help
A driver for the silicon tuner MxL5007T from MaxLinear.

config MEDIA_TUNER_MC44S803
tristate "Freescale MC44S803 Low Power CMOS Broadband tuners"
depends on VIDEO_MEDIA && I2C
default m if DVB_FE_CUSTOMISE
help
Say Y here to support the Freescale MC44S803 based tuners

endif # MEDIA_TUNER_CUSTOMIZE
1 change: 1 addition & 0 deletions drivers/media/common/tuners/Makefile
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Expand Up @@ -22,6 +22,7 @@ obj-$(CONFIG_MEDIA_TUNER_QT1010) += qt1010.o
obj-$(CONFIG_MEDIA_TUNER_MT2131) += mt2131.o
obj-$(CONFIG_MEDIA_TUNER_MXL5005S) += mxl5005s.o
obj-$(CONFIG_MEDIA_TUNER_MXL5007T) += mxl5007t.o
obj-$(CONFIG_MEDIA_TUNER_MC44S803) += mc44s803.o

EXTRA_CFLAGS += -Idrivers/media/dvb/dvb-core
EXTRA_CFLAGS += -Idrivers/media/dvb/frontends
371 changes: 371 additions & 0 deletions drivers/media/common/tuners/mc44s803.c
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@@ -0,0 +1,371 @@
/*
* Driver for Freescale MC44S803 Low Power CMOS Broadband Tuner
*
* Copyright (c) 2009 Jochen Friedrich <jochen@scram.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.=
*/

#include <linux/module.h>
#include <linux/delay.h>
#include <linux/dvb/frontend.h>
#include <linux/i2c.h>

#include "dvb_frontend.h"

#include "mc44s803.h"
#include "mc44s803_priv.h"

#define mc_printk(level, format, arg...) \
printk(level "mc44s803: " format , ## arg)

/* Writes a single register */
static int mc44s803_writereg(struct mc44s803_priv *priv, u32 val)
{
u8 buf[3];
struct i2c_msg msg = {
.addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 3
};

buf[0] = (val & 0xff0000) >> 16;
buf[1] = (val & 0xff00) >> 8;
buf[2] = (val & 0xff);

if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
mc_printk(KERN_WARNING, "I2C write failed\n");
return -EREMOTEIO;
}
return 0;
}

/* Reads a single register */
static int mc44s803_readreg(struct mc44s803_priv *priv, u8 reg, u32 *val)
{
u32 wval;
u8 buf[3];
int ret;
struct i2c_msg msg[] = {
{ .addr = priv->cfg->i2c_address, .flags = I2C_M_RD,
.buf = buf, .len = 3 },
};

wval = MC44S803_REG_SM(MC44S803_REG_DATAREG, MC44S803_ADDR) |
MC44S803_REG_SM(reg, MC44S803_D);

ret = mc44s803_writereg(priv, wval);
if (ret)
return ret;

if (i2c_transfer(priv->i2c, msg, 1) != 1) {
mc_printk(KERN_WARNING, "I2C read failed\n");
return -EREMOTEIO;
}

*val = (buf[0] << 16) | (buf[1] << 8) | buf[2];

return 0;
}

static int mc44s803_release(struct dvb_frontend *fe)
{
struct mc44s803_priv *priv = fe->tuner_priv;

fe->tuner_priv = NULL;
kfree(priv);

return 0;
}

static int mc44s803_init(struct dvb_frontend *fe)
{
struct mc44s803_priv *priv = fe->tuner_priv;
u32 val;
int err;

if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);

/* Reset chip */
val = MC44S803_REG_SM(MC44S803_REG_RESET, MC44S803_ADDR) |
MC44S803_REG_SM(1, MC44S803_RS);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

val = MC44S803_REG_SM(MC44S803_REG_RESET, MC44S803_ADDR);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

/* Power Up and Start Osc */

val = MC44S803_REG_SM(MC44S803_REG_REFOSC, MC44S803_ADDR) |
MC44S803_REG_SM(0xC0, MC44S803_REFOSC) |
MC44S803_REG_SM(1, MC44S803_OSCSEL);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

val = MC44S803_REG_SM(MC44S803_REG_POWER, MC44S803_ADDR) |
MC44S803_REG_SM(0x200, MC44S803_POWER);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

msleep(10);

val = MC44S803_REG_SM(MC44S803_REG_REFOSC, MC44S803_ADDR) |
MC44S803_REG_SM(0x40, MC44S803_REFOSC) |
MC44S803_REG_SM(1, MC44S803_OSCSEL);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

msleep(20);

/* Setup Mixer */

val = MC44S803_REG_SM(MC44S803_REG_MIXER, MC44S803_ADDR) |
MC44S803_REG_SM(1, MC44S803_TRI_STATE) |
MC44S803_REG_SM(0x7F, MC44S803_MIXER_RES);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

/* Setup Cirquit Adjust */

val = MC44S803_REG_SM(MC44S803_REG_CIRCADJ, MC44S803_ADDR) |
MC44S803_REG_SM(1, MC44S803_G1) |
MC44S803_REG_SM(1, MC44S803_G3) |
MC44S803_REG_SM(0x3, MC44S803_CIRCADJ_RES) |
MC44S803_REG_SM(1, MC44S803_G6) |
MC44S803_REG_SM(priv->cfg->dig_out, MC44S803_S1) |
MC44S803_REG_SM(0x3, MC44S803_LP) |
MC44S803_REG_SM(1, MC44S803_CLRF) |
MC44S803_REG_SM(1, MC44S803_CLIF);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

val = MC44S803_REG_SM(MC44S803_REG_CIRCADJ, MC44S803_ADDR) |
MC44S803_REG_SM(1, MC44S803_G1) |
MC44S803_REG_SM(1, MC44S803_G3) |
MC44S803_REG_SM(0x3, MC44S803_CIRCADJ_RES) |
MC44S803_REG_SM(1, MC44S803_G6) |
MC44S803_REG_SM(priv->cfg->dig_out, MC44S803_S1) |
MC44S803_REG_SM(0x3, MC44S803_LP);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

/* Setup Digtune */

val = MC44S803_REG_SM(MC44S803_REG_DIGTUNE, MC44S803_ADDR) |
MC44S803_REG_SM(3, MC44S803_XOD);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

/* Setup AGC */

val = MC44S803_REG_SM(MC44S803_REG_LNAAGC, MC44S803_ADDR) |
MC44S803_REG_SM(1, MC44S803_AT1) |
MC44S803_REG_SM(1, MC44S803_AT2) |
MC44S803_REG_SM(1, MC44S803_AGC_AN_DIG) |
MC44S803_REG_SM(1, MC44S803_AGC_READ_EN) |
MC44S803_REG_SM(1, MC44S803_LNA0);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
return 0;

exit:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);

mc_printk(KERN_WARNING, "I/O Error\n");
return err;
}

static int mc44s803_set_params(struct dvb_frontend *fe,
struct dvb_frontend_parameters *params)
{
struct mc44s803_priv *priv = fe->tuner_priv;
u32 r1, r2, n1, n2, lo1, lo2, freq, val;
int err;

priv->frequency = params->frequency;

r1 = MC44S803_OSC / 1000000;
r2 = MC44S803_OSC / 100000;

n1 = (params->frequency + MC44S803_IF1 + 500000) / 1000000;
freq = MC44S803_OSC / r1 * n1;
lo1 = ((60 * n1) + (r1 / 2)) / r1;
freq = freq - params->frequency;

n2 = (freq - MC44S803_IF2 + 50000) / 100000;
lo2 = ((60 * n2) + (r2 / 2)) / r2;

if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);

val = MC44S803_REG_SM(MC44S803_REG_REFDIV, MC44S803_ADDR) |
MC44S803_REG_SM(r1-1, MC44S803_R1) |
MC44S803_REG_SM(r2-1, MC44S803_R2) |
MC44S803_REG_SM(1, MC44S803_REFBUF_EN);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

val = MC44S803_REG_SM(MC44S803_REG_LO1, MC44S803_ADDR) |
MC44S803_REG_SM(n1-2, MC44S803_LO1);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

val = MC44S803_REG_SM(MC44S803_REG_LO2, MC44S803_ADDR) |
MC44S803_REG_SM(n2-2, MC44S803_LO2);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

val = MC44S803_REG_SM(MC44S803_REG_DIGTUNE, MC44S803_ADDR) |
MC44S803_REG_SM(1, MC44S803_DA) |
MC44S803_REG_SM(lo1, MC44S803_LO_REF) |
MC44S803_REG_SM(1, MC44S803_AT);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

val = MC44S803_REG_SM(MC44S803_REG_DIGTUNE, MC44S803_ADDR) |
MC44S803_REG_SM(2, MC44S803_DA) |
MC44S803_REG_SM(lo2, MC44S803_LO_REF) |
MC44S803_REG_SM(1, MC44S803_AT);

err = mc44s803_writereg(priv, val);
if (err)
goto exit;

if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);

return 0;

exit:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);

mc_printk(KERN_WARNING, "I/O Error\n");
return err;
}

static int mc44s803_get_frequency(struct dvb_frontend *fe, u32 *frequency)
{
struct mc44s803_priv *priv = fe->tuner_priv;
*frequency = priv->frequency;
return 0;
}

static const struct dvb_tuner_ops mc44s803_tuner_ops = {
.info = {
.name = "Freescale MC44S803",
.frequency_min = 48000000,
.frequency_max = 1000000000,
.frequency_step = 100000,
},

.release = mc44s803_release,
.init = mc44s803_init,
.set_params = mc44s803_set_params,
.get_frequency = mc44s803_get_frequency
};

/* This functions tries to identify a MC44S803 tuner by reading the ID
register. This is hasty. */
struct dvb_frontend *mc44s803_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c, struct mc44s803_config *cfg)
{
struct mc44s803_priv *priv;
u32 reg;
u8 id;
int ret;

reg = 0;

priv = kzalloc(sizeof(struct mc44s803_priv), GFP_KERNEL);
if (priv == NULL)
return NULL;

priv->cfg = cfg;
priv->i2c = i2c;
priv->fe = fe;

if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */

ret = mc44s803_readreg(priv, MC44S803_REG_ID, &reg);
if (ret)
goto error;

id = MC44S803_REG_MS(reg, MC44S803_ID);

if (id != 0x14) {
mc_printk(KERN_ERR, "unsupported ID "
"(%x should be 0x14)\n", id);
goto error;
}

mc_printk(KERN_INFO, "successfully identified (ID = %x)\n", id);
memcpy(&fe->ops.tuner_ops, &mc44s803_tuner_ops,
sizeof(struct dvb_tuner_ops));

fe->tuner_priv = priv;

if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */

return fe;

error:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */

kfree(priv);
return NULL;
}
EXPORT_SYMBOL(mc44s803_attach);

MODULE_AUTHOR("Jochen Friedrich");
MODULE_DESCRIPTION("Freescale MC44S803 silicon tuner driver");
MODULE_LICENSE("GPL");
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